Malicious PDF — malware analysis report

Static analysis result for SHA-256 5453748755f24fc2…

MALICIOUS

PDF

84.6 KB Created: 2021-07-23 11:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc2b12e06913175b45681062edb5e032 SHA-1: b356c4d639251280d8643a6941a609d131403e15 SHA-256: 5453748755f24fc271b75dac35873a4b8be075deee91c7d5c3fd36cf38cbe68a
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely responsible for initiating the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cairparavel.ro/app/webroot/files/userfiles/files/pigasupopavof.pdf In PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f4f2d80e4f7bbb8d0a8e21e648fb446d/41436575323.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/farqml838734u0fapo0dhlvqk9/72600409869.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/89153627956.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062020064073499.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/pokokolagavepolajawute.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/89082935125.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/2n90iom5vlqdb3fgdcft72fdii/lokinikolapesofokiwokil.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/faguv.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/lutovaxumelovogu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c711a76e98c---kitowiwibirikupor.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/47758696062.pdfIn PDF document text
    • https://mavibusiness.it/file/xokifuzudosipabemoka.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/004150df75eace04b14163d2914c1161/98540204206.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/32262172585.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/40883879320.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/gaberosegiwi.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/24b92be43d9b686b2622ef98426f5c24/rufimogege.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/93134927690.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa5dd1f772---tirusorobusipuzi.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/30172549814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cooking+time+for+apple+crumblePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/jegivogena.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 16656 bytes
SHA-256: d9068f3d156ed3cacdc3cd45ddf7edd2fac96c24021ba05b3ebef554460666a9
font_01_sfnt_off0001133f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 11016 bytes
SHA-256: bc26432fd32a892588097a7bcd38fedeba1e856b9fa1ab04cb05d393b428111d

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